Changes
Z80
,/* 8-bit ALU group */
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! Instruction !! Opcode !! NOPs !! Cycles !! S !! Z !! 5 !! H !! 3 !! P !! N !! C !! Effect !! Description
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| inc r || 00rrr100 || 1 || 4 (4) || + || + || + || + || + || V || 0 || - || r += 1 ||rowspan=4|Increment
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| inc p || 11i11101 00ppp100 || 2 || 8 (4,4) || + || + || + || + || + || V || 0 || - || p += 1
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| inc (hl) || 00110100 || 3 || 11 (4,4,3) || + || + || + || + || + || V || 0 || - || (hl) += 1
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| inc (ixy+d) || 11i11101 00110100 dddddddd || 6 || 23 (4,4,3,5,4,3) || + || + || + || + || + || V || 0 || - || (ixy+d) += 1
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| dec r || 00rrr101 || 1 || 4 (4) || + || + || + || + || + || V || 1 || - || r -= 1 ||rowspan=4|Decrement
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| dec p || 11i11101 00ppp101 || 2 || 8 (4,4) || + || + || + || + || + || V || 1 || - || p -= 1
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| dec (hl) || 00110101 || 3 || 11 (4,4,3) || + || + || + || + || + || V || 1 || - || (hl) -= 1
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| dec (ixy+d) || 11i11101 00110101 dddddddd || 6 || 23 (4,4,3,5,4,3) || + || + || + || + || + || V || 1 || - || (ixy+d) -= 1
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| add a,r || 10000rrr || 1 || 4 (4) || + || + || + || + || + || V || 0 || + || a += r ||rowspan=5|Add
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| cp n || 11111110 nnnnnnnn || 2 || 7 (4,3) || + || + || X || + || X || V || 1 || + || tmp := a - n, f5 := n.5, f3 := n.3
|}
